Blood Pressures and Heart Rate During Adolescence 193 



94 (2054) 



The blood pressures and heart rate, in girls, during adolescence. 

 Biometrical constants for 1,700 cases. 



By STANLEY ROSS BURLAGE (by invitation). 



[From the Department of Physiology, Cornell Medical College, 



Ithaca, N. Y.] 



In a previous paper before this Society 1 the writer discussed 

 the source and methods used in obtaining this data. 



The biometrical constants determined were, the correlation 

 coefficients, means, standard deviations, each with its probable 

 error, and the probable error of a .single observation. 



Correlation of systolic pressure, diastolic pressure, pulse pres- 

 sure and pulse rate was made with age in years, height in inches 

 and weight in pounds. These constants were determined for 

 six different groups of data. i. c\, schoolgirls who had not reached 

 puberty, schoolgirls who had reached puberty, total schoolgirls, 

 schoolgirls who had reached puberty and college girls, college 

 girls, and finally the total schoolgirl and college girl population. 



The numerical values of the constants will be published else- 

 where and only the general conclusions given here. 



Conclusions : 



1 — Blood pressure and pulse rate data for schoolgirls and 

 college girls must be correlated separately. That for school- 

 girls must further be separated into a group of girls who have 

 reached puberty and a group who have not. 



2 — When systolic pressure is correlated with weight, height 

 and age : 



a — Schoolgirls who have not menstruated show the greatest 



correlation with the factors, weight, height and age, in 



the order named, 

 b — Schoolgirls who have reached puberty show correlation, 



in this order, with weight and height but none with age. 



These coefficients are less than those in (a), 

 c — College girls show significant correlation only with 



weight. 



i Burlage, S. R., Proc. Soc. Exp. Biol, and Med., 1922, xix, 247. 



